/Engine/Source/Editor/UnrealEd/Public/EditorViewportClient.h
Functions for registering and evaluating prioritized input chords. When a prioritized chord evaluates true its required keys are ignored by all lower priority chords, providing a way to resolve conflict between input key combinations.
void RegisterPrioritizedInputChord ( const [FPrioritizedInputChord](API\Editor\UnrealEd\FPrioritizedInputChord) & InInputCord )